Hydraulic motor.



3 SHEETS-SHEET 1.

Patented Oct. 19, 1909.

H. G. SGHAE-FER.

HYDRAULIC MOTOR. APPLIOATION FILED sEPT. 1. lso.

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H. o. SCHAEPBR.

HYDRAULIC MOTOR.

APPLIOATION FILED SEPT. 1,'1908.

Patented Oct. 19,1909.

3 SHEETS-SHEET 2.

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AH. C. SGHAEFER.

HYDRAULIC MOTOR.

PPLIOATION FILED SEPT. 1. 1908.

937,649. Patented Oct. 19,1909.

3 SHEETS-SHEET 3.

WITNESS/58.'

ATTORNEYS UNITED STATES, PATENT OFFTCE.

HERBERT CLYDE SCI-IAEFER, OF EL PASO, TEXAS.

HYDRAULIC MOTOR.

To all whom it may concern.'

Be it known that I, HERBERT C. SGHAEFER, residing at El Paso, in the county of El Paso and State of Texas, have invented a new and Improved Hydraulic Motor, of which the following is a specification.

This invention relates to improvements in that type of fluid pressure motors, that have a rotary head with shiftable pistons, operable in a casing having peripherally arranged inlet and outlet openings, and the said invention primarily has for its object to provide a motor of the character stated, of a simple and compact nature, in which the parts are especially'designed for reducing back pressure, and directing the fluid from the moment it enters the motor to its discharge constantly under a full head on 'the downward trend.

My invention comprehends, generally, a casing having an annular chamber and an inlet and outlet in communication therewith, a rotary piston operable in the said chamber and eccentrically mounted thereon, a shaft loosely journaled in the heads of the casing, radially shiftable piston blades mounted on and movable with the piston, means coupled with the shaft to rotate therewith but shiftably mounted thereon that engage the casing and connected with the piston blades to positively shift them in their passage around the abutment wall of the annular chamber.

In its more complete nature, my invention embodies a casing having a central piston head receiving chamber, a supplemental chamber located .one at each side of the central chamber, a piston and shaft therefor, eccentrically mounted in the central chamber, radially shiftable piston blades carried by the piston and a shiftable frame in each supplemental chamber coupled with the shaft to rotate therewith, said shiftable frame having roller bearings for engaging the casing and means that couple the piston blades to the said shiftable frames.

In its still more subordinate features, my invention consists in certain details of construction and novel arrangement of parts, all of which will be hereinafter fully explained, specifically pointed out in the appended claims and illustrated in the accompanying drawings, in which,

Figure l, is a perspective view of my invention, one of the heads of the casing being removed to illustrate the general arrange- Speccation of Letters Patent.

Application filed September l, 1.908.

Patented Oct. 19, 1909.

Serial No. 451,212.

ment of a part of the roller bearing and piston blades-supporting frames. Fig. 2, is a transverse section thereof. Fig. 3, is a vertical longitudinal section thereof on the line 3 3 on Fig. 2. Fig. 4, is a side elevation y ofthe piston blades and supporting friction roller carrying frame and illustrates the adjustable connections for the piston blades. Fig. 5, is a diagram illustrating the path or travel surface on the casing for the roller bearings hereinafter referred to. Fig. 6, is a diagram that illustrates the path of travel of the piston blades or shoes.

In the practical construction, the shell or casing is composed of a central or housing portion a and two end caps b b that are bolted to the housing a in the usual manner. The housing a, in my invention, has three independent cylindrical chambers, a central one 2, and two end ones 1 1, one at each side of the central one 2, from which they are separated by the inwardly projected annular flanges 3 3, as clearly shown in Fig. 3, by reference to which and Fig. 2 it will be seen that the piston carrying shaft 4 has rounded portions 40 for engaging the journal hubs Z/ o on the casing heads, and has the remainder made square in cross section, as indicated by b2, for reasons presently explained.

The journal bearings for the shaft 4 are disposed eccentrically to the cylindrical chambers 1 1 and 2, so as to likewise mount the circular piston head 5, the said head having a square axial opening 5l to receive the shaft 4, the mounting of the rotary piston head in the shaft being such that the peripheral face 52 of the piston head engages the abutment or annular wall of the central chamber 2 at a point just in advance of the inlet .fr that joins with the by pass or fluid passage that extends around one side of the chamber 2 to the exhaust or discharging outlet y, as shown.

The rotary cylinder head, which is of a width to snugly fit the central chamber 2, has openings m/ m to reduce its weight and it has a number of radially projected sockets 53-53 that extend from the axial opening 5l to the periphery of the head, they merging with seats 54 in said periphery, the purpose of which will presently appear. ln each socket 53 is slidably mounted a piston blade 6 that carries a shoe 60 at the outer end, said shoe being pivotally mounted on the said outer end formed with a widened and curved contacting surface 61, see Fig. 3, the body of said shoe and the seats or recesses 54 being relatively such that when the piston blades are drawn inwardly to their limit the shoes will snugly fit into said recesses until their bearing faces lie flush with or slightly insidethe peripheral face of the rotary head.

To provide for a substantially uniform width of the passage to a point where the blades close off the said passage and that the blades receive the maximum fluid impulse from that point to the point of discharge, the wall of the chamber 2 that the shoes contact has a pair of crescent shaped grooves 7 7 that are disposed in longitudinal alinement into which the said shoes project as they pass thereover, as will be clearly understood by referring to Figs. 2 and G of the drawing, the latter' figure diagrammatically illustrating the relation of the inlet and the outlet to the chamber 2 and the correlative position of the grooves 7-7 with the rotary piston indicated by the line 5,- 12-12 indicating the points in the passage between which the blades travel as complete cut offs.

X in Fig. 6 designates the inlet throat and y the discharge therefrom.

Adjacent, but in advance of the inlet to the chamber 2 the casing has a thickened portion 2O having a transverse socket 21 on its v inner face for receiving a packing 8, the

pressure of which against the periphery of the rotary head 5 is regulated by the tension screw 80 and the bearing spring 81 on the Y packing and on which the screw 80 bears.

'The packing strip in my construction of motor passes over the shoes 60 when they come thereunder, since the means (presently stated) that shift the valve blades, brings the shoes fully back into the seats with their bearing faces slightly within the peripheral face of the rotary disk.

To positively take off the friction on all the movable pistons and for shift-ing them as they rotate over the annular bearing wall of the chamber 2, a shifting mechanism is mounted in each of the side chambers 1 1 that connect with the several pistons in the manner best shown in Figs. 3 and 4 by reference to which it will be seen that each of said mechanisms consists of an elongated bar or plate 9, having an elongated slot 90 for the passage therethrough of the squared portion of the driven shaft, and formed with bifurcated ends 91 91 to Vreceive the journals for roller bearings 92-92 that travel over the internal annular faces 10-10 of thev side members 1-1 and follows the internal conto-ur of said chambers 1-1 and thus make suitable provision for allowing the blades t0 fully recede into their respective seats inthe rotary piston head. At each end, each of the sliding frames 9 has brackets 93 in which are mounted adjusting screws 12-12 that are removably clamped to laterally projected portions that extend from the o-pposite edges of the blades 6 as clearly shown in Fig. 3.

By connecting the piston blades to the screws 12-12 and the screw 12 to the frames 9 in the manner shown and described, the said blades can be readily adjusted to fit Vsnugly against or barely touch the wall of the central or motor chamber 2, by simply turning the screws 12. Y

As the lower parts of the chambers 1-1 on which the frames 9 travel have a trough shape, they may bepartially filled with oil, see Fig. 3 to thoroughly lubricate the roller bearings as they pass therethrough.

From the foregoing, taken in Vconnection with the drawings the complete construction, operation and the advantages of my invention will be readily understood, since the passage of the water from the inlet to the exhaust is of uniform size, 'back pressure vis materially reduced and all the water from the moment it enters is on the downward trend and as the piston blades are positively acted on by the constantly changing (sliding) movement of the frames 9 9 the friction thereof is largely taken up by the rollers 92-92. i

Having thus described my invention, what I claim-is:

1. In a hydraulic motor, the following elements in combination; a'casing having a plurality of stationary walled annular chambers, one of which has inlet and exhaust ports, a rotary piston head and a shaft therefor, eccentrically mounted in the chamber having the inlet and exhaust ports and engaging the wall thereof in advance of the inlet, piston blades on the head radiallyV slidable thereon, and means rotatable with the shaft but having endwise slidable movement thereon, mounted in another of the annular chambers of the casing, cooperatively connected with the radially shiftable blades.

2. In a hydraulic motor, the following elements in combination; a casing having a plurality of stationary walled annular chambers, one of which has inlet and exhaustV ports, a rotary piston head and a shaft therefor, eccentrically mounted in the chamber having the inlet and exhaust ports and engaging the wall thereof in advance of the inlet, piston blades on the` head radially slidable thereon, and means rotatable with the shaft but having endwise slidable movement thereon, mounted in another of the annular chambers of the casing, cooperatively connected with the radially shiftable blades; said means including roller bearings at the opposite ends always in contact with the annular stationary wall of the chamber in which they travel. v

3. In a hydraulic motor, the combination with the casing having three stationary ioo walled annular chambers in alinement, the central one having an inlet and an exhaust, and a closure abutment in advance of the inlet, a rotary piston head and shaft therefor, eccentrically mounted in the central chamber, with the head engaging with the closure abutment, a series of piston blades radially slidable in the head to engage the annular wall of the central chamber; of a means mounted in each of the other chambers, each comprising aslotted member for engaging the shaft to turn therewith, bearings at the opposite ends for engaging the annular wall of their respective casing chambers, and connections that join the said means with the radially shiftable piston blades, as set forth.

4. In a hydraulic motor, the combination with the casing, having three stationary walled annular chambers in alinement, the central one having an inlet and an exhaust, and a closure abutment in advance of the inlet, a rotary piston head and shaft therefor, eccentrically mounted in the central chamber, with the head engaging with the closure abutment, a series of piston blades radially slidable in the head to engage the annular stationary wall of the central chamber; of a means mounted in each of the other chambers, each comprising a slotted member for engaging the shaft to turn therewith, bearings at the opposite ends for engaging the annular wall of their respective casing chambers, and adjustable connections that join the said means with the radially shiftable piston blades, as set forth.

5. The combination of the casing having three stationary walled annular chambers, in transverse alinement, the central one having an inlet and an outlet and a closure abut-4 ment in advance of the inlet, a rotary piston head eccentrically mounted in the said central chamber to engage the closure abutment, an adjustable packing in the abutment for engaging the periphery of the rotary piston head, piston blades radially slidable in the head and to project beyond the peripheral face thereof, a shaft for the piston head that extends through all the chambers, a slotted frame in each outer chamber, mounted on the shaft to rotate therewith, said frame having bearings at the ends for engaging the annular walls of their respective chambers and connections that join the ends of the said frames with the piston blades, for the purposes specified.

G. The combination with the casing having three stationary walled annular chambers in transverse alinement, the central having inlet and outlet ports and a closure abutment in advance of its inlet, a rotary piston head eccentrically mounted in said central chamber, a series of radially shiftable piston blades carried by the head, bearing shoes pivotally mounted on the outer end of each blade, the piston head having pockets for seating said shoes thereon as they pass under the closure abutment portion of the chamber wall, a shaft for the rotary head, a longitudinally slotted cross frame in each en'd compartment that rides on the shaft and connections that join the said frames with the radially shiftable piston blades.

7. The combinationof the casing having three solid wall annular chambers in transverse alinement, the central chamber having inlet and outlet ports and a closure abut-ment, the wall at predetermined points having grooves of gradually tapering depth, a rotary piston head eccentrically mounted in the central chamber to engage the closure abutment, a shaft for the rotary head piston blades, radially slidable from the head, bearing shoes pivotally mounted on the outer ends of the blades to extend into the grooves of the annular wall as they pass thereover, a cross frame mounted on each of the end chambers, having roller bearings on their opposite ends, and having elongated slots to receive the shaft end, the said shaft ends being shaped to interlock with the frames, the annular walls of the said chambers each having a tapering groove at predetermined points to receive the roller bearings and couplings that join the ends of the frames with the slidable piston blades, the piston head having pockets in the periphery to seat the shoes on the blades.

HERBERT CLYDE SCHAEFER.

Vitnesses:

(l1-ms. A. KINKEL, U. D. PARKER. 

